Permutation-pad lock



{No Model.)

7, G. 1 .1mm IBRIMUIITATION PADLOG K.'

No. 568,562.. Patented Sept. 29, 1896.

NITED STATES PATENT FFICE.

- GEORGE F. DAY, OF BOSTON, MASSACHUSETTS.

PERM UTATlON-PADLOCK.

SPECIFICATION forming part of Letters Patent No. 568,562, datedSeptember 29, 1896.

Application filed May 4, 1896. Serial No. 590,119. (No model.)

on the permutation principle by means of a.

plurality of tumblers which must be moved into a certain predeterminedrelative arrangement before it is possible to unlock the look.

It is very desirable in connection with small articles and with bicycleand hitching chains and in other relations that a strong, durable, andcompact keyless padlock should be provided which cannot be easily pickedand which at the same time shall be at least as cheap as the ordinarypadlock which is operated bya key. Accordingly it is the object of myinvention to provide such a padlock, my invention, however, not beinglimited in its use to a padlock, but being readily applicable to otherforms of looks.

My invention will be more fully set forth hereinafter by detaileddescription, reference being had to the accompanying drawings,and willbe further defined in the claims hereunto annexed.

In the drawings illustrative of one form of my invention, Figure 1 is afront .elevation showing my improvement applied to a padlock. Fig. 2 isa central vertical section taken on the line 2 of Fig. 1. Figs. 3 and 4are reverse elevations of the halves of the padlock opened away fromeach other; and Fig. 5 is a View similar to Fig. 4, showing a modifiedform of locking-bolt.

. In the present embodiment of my invention, as herein shown applied toa padlock, A designates the inclosing case, and B designates the hasp orsecuring bow or link,which may be of any usual pattern.

The hasp Bis herein shown as suitably pivoted at b and as held in lockedposition by means of the lock-bolt C, Fig. 4, or C, Fig. 5. This hasp isalso preferably spring-controlled either by means, for instance, of thespring 8, Fig. 4, operating against the ejector D, or by means of theupper spring 3, Fig. 5.

Suitably connected with the lock-bolt and herein shown as resting uponthe same is a spindle or projection 6, carried by a tumbler E, suitableoperating means for the lock-bolt being provided in connection with thetumbler or tumblers and spindle e, said means being herein shown as thestem or thumbpost 6, extending integrally from the tumbler E to theoutside of the case A.

I have herein shown two upper tumblers E E and one lower tumbler G, butthis may be reversed, or, if desired, any number of upper and lowertumblers may be employed in an obvious manner.

The tumbler E is herein shown as being carried by a thimble esurrounding the post e, the two tumblers E E being of the same diameterand having registering notches 6 as is customary in permutation-locks.These notches e are adapted to register with a tongue g, extending fromthe cut-away portions 9 of the lower tumbler G. Of course any otherusual or suitable interlocking or registering means maybe substitutedfor the ton gue-andnotch arrangement herein shown.

When the respective tumblers are brought into proper registeringjuxtaposition, as indicated in Fig. 3, the lock-bolt is actuated bysliding the thumb-post e laterally in the slot a, formed in the case A.This lateral movement is permitted by reason of the fact that the tongue9 is then opposite the registering notches a so that the latter may bemoved downwardly over the former, whereas, when the several tumblers arein any other position than the proper registering position indicated,they will mutally prevent any bodily lateral movement whatever of thetwo sets of tumblers relatively to each other.

As a means of enabling the operator of the lock to quickly arrange thetumblers in their required registering position, the case A is providedwith suitable dials, herein shown as comprising two eccentric circles,numbered, respectively, 1 to 12 and 10 to 60, Fig; 1, the respectivetumblers having rigidly connected therewith the pointer arms oractuators e e and g In the use of my improved look, when itis the hasp Bis turned down into the case A, as shown in Figs. land 5, and isimmediately engaged by the spring-pressed lock-bolt and securely held inlocked position. \Vhen it is desired to unlock the same, the respectiveactuators 6, e, and g are carefully turned to those points of the dialsfor which the tumblers are set and the notches e and tongue or tongues gare brought into cooperating registering position, as shown in Fig. 3.The operator then presses downwardly on the thumb-post e and thereby, bymeans of the engagement of the projection c with the lockbolt, operatesthe same, the thumb-post c and thimble e sliding in the slot at andcarrying the tumblers E E with them, depressing the lock-bolt until itis disengaged from the hasp B. The latter then immediately springsforward at its free end by reason of the spring 8 or s or other suitableejecting means.

While I have herein shown the bodily movement of the tumblers asrestricted to the upper set of tumblers, yet it is obvious that ifdesired the lower tumblers may have a corresponding or other desiredmovement, if preferred; also, while I have shown the bodily movement asa lateral one, I do not intend to restrict myself to that movementotherwise than as specified in the claims, inasmuch as various othermovements may be substituted.

Many other changes than those noted may be made in form, proportions,and relations of parts of my invention without departing from the spiritand scope of my invention.

hat I claim is 1. In a permutation-lock, a plurality ofindependently-rotatable tumblers, concentrically mounted, and capable ofbodily lateral movement, means operated from the outside of the lock toso move said tumblers laterally, independent actuators rigidly mountedon and to rotate with said tumblers, and a fixed tumbler, alsorotatable, said tumbler when in one position permitting said lateralmovement and when in another position preventing said lateral movement,substantially as described.

2. In a permutation-lock, the lock-case, a slot therein, twoindependently rotatable tumblers within said case, independent actuatorson the outside of said case and rigidly connected to said tumblersthrough said slot, and a tumbler mounted in a fixed bearing in said caseand provided with an external actuator, said latter tumbler beingarranged to cooperate with said former tumblers, substantially asdescribed.

3. In a permutation-lock, a lock-bolt, and a spring normally maintainingthe bolt in looking position, combined with a tumbler adapted to operatethe bolt, the tumbler bein g bodily movable laterally from the outsideof said lock, and said bolt being movable independently of the tumbler,and means cooperating with said tumbler permitting and preventingmovement thereof, substantially as described.

4.. In a permutation-lock, a lock-bolt, and two independent tumblers,one being rotatable in a fixed bearing, and the other being laterallymovable to cooperate with said fixed tumbler, said laterally-movabletumbler having a projection to en gage and move the bolt, and said twotumblers being independently rotatable both when the lock is locked andunlocked, substantially as described.

5. As an article of manufacture, a lock, having a case, a lock-bolt, aspring tending to maintain said bolt in looking position, twoindependent tumblers within the case, independent actuators rigidtherewith and extcrnal to the case, one tumbler being mounted in fixedbearings, and the other tumbler being movable in its bearings, saidtumblers being arranged to cooperate with each other, and a spindle orprojection on one tumbler arranged to operate said bolt against saidspring, the bolt being also movable independently of the saidprojection, substantially as described.

6. As an article of manufacture, a lock, having a case, a lock-boltpivotally mounted therein, external operating means therefor permanentlymounted on the lock, and tumblers controlling said operating means, saidtumblers being independently movable both when the lock is locked andunlocked, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

GEORGE F. DAY. \Vitnesses:

GEO. W. GREGORY, GEo. II. MAXWELL

